I still pay something for my packs and have done the last 5 death hikes. But yeah, you need to be tight with the guys. Solid group....its been a life changing experience and definitely changes your mentality on most things.
I have had a Kuiu and now on my 3rd Exo. There is no comparison what so ever, especially with a heavy load. I hike well over 300 miles a year between hunting and hiking events....the Exo is on another level!
I have a K2 3500, K3 1800 and 4800. I have done 7 days/nights with the 4800. If you are spending more than a week, I can see the 6400; otherwise pack efficiently and drop bring half your house. The K3/4800 is my favorite EXO pack of what is currently available 😉